Lunarware Sudoku was the browser puzzle player at sudoku.lunarware.com. The September 6, 2007 listing described an interface intended for iPhone and iPod touch, with an emphasis on a clean presentation.
The grid is the interface
For a number-placement puzzle, legibility is part of the work. The player needs to distinguish a fixed clue from an entry and keep neighboring cells in view while reasoning about the board. Those are useful questions for examining a preserved interface; the sparse listing does not establish how Lunarware answered them.
In particular, the archive does not identify difficulty levels, pencil marks, hints, a timer or saved progress. Such features are common ways to extend a puzzle player, but assigning them to this historical version would go beyond the evidence.
Current playability has not been verified and no puzzle was completed for this article. The purpose of this recovered page is to retain the original Lunarware identity and web destination, rather than merge it with a later Sudoku app carrying a different publisher.